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bekas [8.4K]
3 years ago
13

A number cube numbered 1-6 is rolled 30 times and lands on an even number 18 times. How

Mathematics
1 answer:
nekit [7.7K]3 years ago
7 0

Answer:

The frequency is 3 more than expected.

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If you measure a tds of 1.4%, and you used a brew ratio of 15, what is the percent extraction?
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Explanation:

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PE = Percent Extraction = percent of solids extracted from the dry coffee grounds

The percent extraction can be calculated by the formula:
PE = TDS × Rm

where
Rm = ratio between the mass of the brew and the mass of dry grounds

Now, you need to consider the following facts:
1) every 1g of coffee absorbs 2g of water
2) the given brew ratio is 1:15, which means that for every 1g of grounds we use 15g of water

Let's call
x = grams of coffee grounds we want to use
Therefore the mass of the brew will be: 
m(brew) = water we use - water absorbed by the coffee
              = 15·x - 2·x
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Therefore,
Rm = m(brew) / x
       = 13·x / x
       = 13

Hence, the percent of extraction will be:
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3 years ago
Pleas answer this question now
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Answer:

x = 17

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According to the two tangent theory, tangent MN and tangent NP, which are both from point N, are congruent.

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Solve for x

x + 4 = 21

Subtract 4 from both sides

x + 4 - 4 = 21 - 4

x = 17

5 0
4 years ago
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